1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* 3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 4 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 5 */ 6 7 #include <linux/skbuff.h> 8 #include <linux/delay.h> 9 #include <linux/sched.h> 10 #include <linux/vmalloc.h> 11 #include <rdma/uverbs_ioctl.h> 12 13 #include "rxe.h" 14 #include "rxe_loc.h" 15 #include "rxe_queue.h" 16 #include "rxe_task.h" 17 18 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap, 19 int has_srq) 20 { 21 if (cap->max_send_wr > rxe->attr.max_qp_wr) { 22 pr_warn("invalid send wr = %d > %d\n", 23 cap->max_send_wr, rxe->attr.max_qp_wr); 24 goto err1; 25 } 26 27 if (cap->max_send_sge > rxe->attr.max_send_sge) { 28 pr_warn("invalid send sge = %d > %d\n", 29 cap->max_send_sge, rxe->attr.max_send_sge); 30 goto err1; 31 } 32 33 if (!has_srq) { 34 if (cap->max_recv_wr > rxe->attr.max_qp_wr) { 35 pr_warn("invalid recv wr = %d > %d\n", 36 cap->max_recv_wr, rxe->attr.max_qp_wr); 37 goto err1; 38 } 39 40 if (cap->max_recv_sge > rxe->attr.max_recv_sge) { 41 pr_warn("invalid recv sge = %d > %d\n", 42 cap->max_recv_sge, rxe->attr.max_recv_sge); 43 goto err1; 44 } 45 } 46 47 if (cap->max_inline_data > rxe->max_inline_data) { 48 pr_warn("invalid max inline data = %d > %d\n", 49 cap->max_inline_data, rxe->max_inline_data); 50 goto err1; 51 } 52 53 return 0; 54 55 err1: 56 return -EINVAL; 57 } 58 59 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init) 60 { 61 struct ib_qp_cap *cap = &init->cap; 62 struct rxe_port *port; 63 int port_num = init->port_num; 64 65 if (!init->recv_cq || !init->send_cq) { 66 pr_warn("missing cq\n"); 67 goto err1; 68 } 69 70 if (rxe_qp_chk_cap(rxe, cap, !!init->srq)) 71 goto err1; 72 73 if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) { 74 if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) { 75 pr_warn("invalid port = %d\n", port_num); 76 goto err1; 77 } 78 79 port = &rxe->port; 80 81 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) { 82 pr_warn("SMI QP exists for port %d\n", port_num); 83 goto err1; 84 } 85 86 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) { 87 pr_warn("GSI QP exists for port %d\n", port_num); 88 goto err1; 89 } 90 } 91 92 return 0; 93 94 err1: 95 return -EINVAL; 96 } 97 98 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n) 99 { 100 qp->resp.res_head = 0; 101 qp->resp.res_tail = 0; 102 qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL); 103 104 if (!qp->resp.resources) 105 return -ENOMEM; 106 107 return 0; 108 } 109 110 static void free_rd_atomic_resources(struct rxe_qp *qp) 111 { 112 if (qp->resp.resources) { 113 int i; 114 115 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 116 struct resp_res *res = &qp->resp.resources[i]; 117 118 free_rd_atomic_resource(qp, res); 119 } 120 kfree(qp->resp.resources); 121 qp->resp.resources = NULL; 122 } 123 } 124 125 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res) 126 { 127 if (res->type == RXE_ATOMIC_MASK) { 128 rxe_drop_ref(qp); 129 kfree_skb(res->atomic.skb); 130 } else if (res->type == RXE_READ_MASK) { 131 if (res->read.mr) 132 rxe_drop_ref(res->read.mr); 133 } 134 res->type = 0; 135 } 136 137 static void cleanup_rd_atomic_resources(struct rxe_qp *qp) 138 { 139 int i; 140 struct resp_res *res; 141 142 if (qp->resp.resources) { 143 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 144 res = &qp->resp.resources[i]; 145 free_rd_atomic_resource(qp, res); 146 } 147 } 148 } 149 150 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp, 151 struct ib_qp_init_attr *init) 152 { 153 struct rxe_port *port; 154 u32 qpn; 155 156 qp->sq_sig_type = init->sq_sig_type; 157 qp->attr.path_mtu = 1; 158 qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu); 159 160 qpn = qp->pelem.index; 161 port = &rxe->port; 162 163 switch (init->qp_type) { 164 case IB_QPT_SMI: 165 qp->ibqp.qp_num = 0; 166 port->qp_smi_index = qpn; 167 qp->attr.port_num = init->port_num; 168 break; 169 170 case IB_QPT_GSI: 171 qp->ibqp.qp_num = 1; 172 port->qp_gsi_index = qpn; 173 qp->attr.port_num = init->port_num; 174 break; 175 176 default: 177 qp->ibqp.qp_num = qpn; 178 break; 179 } 180 181 INIT_LIST_HEAD(&qp->grp_list); 182 183 skb_queue_head_init(&qp->send_pkts); 184 185 spin_lock_init(&qp->grp_lock); 186 spin_lock_init(&qp->state_lock); 187 188 atomic_set(&qp->ssn, 0); 189 atomic_set(&qp->skb_out, 0); 190 } 191 192 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, 193 struct ib_qp_init_attr *init, struct ib_udata *udata, 194 struct rxe_create_qp_resp __user *uresp) 195 { 196 int err; 197 int wqe_size; 198 199 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); 200 if (err < 0) 201 return err; 202 qp->sk->sk->sk_user_data = qp; 203 204 /* pick a source UDP port number for this QP based on 205 * the source QPN. this spreads traffic for different QPs 206 * across different NIC RX queues (while using a single 207 * flow for a given QP to maintain packet order). 208 * the port number must be in the Dynamic Ports range 209 * (0xc000 - 0xffff). 210 */ 211 qp->src_port = RXE_ROCE_V2_SPORT + 212 (hash_32_generic(qp_num(qp), 14) & 0x3fff); 213 qp->sq.max_wr = init->cap.max_send_wr; 214 215 /* These caps are limited by rxe_qp_chk_cap() done by the caller */ 216 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge), 217 init->cap.max_inline_data); 218 qp->sq.max_sge = init->cap.max_send_sge = 219 wqe_size / sizeof(struct ib_sge); 220 qp->sq.max_inline = init->cap.max_inline_data = wqe_size; 221 wqe_size += sizeof(struct rxe_send_wqe); 222 223 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, wqe_size); 224 if (!qp->sq.queue) 225 return -ENOMEM; 226 227 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, 228 qp->sq.queue->buf, qp->sq.queue->buf_size, 229 &qp->sq.queue->ip); 230 231 if (err) { 232 vfree(qp->sq.queue->buf); 233 kfree(qp->sq.queue); 234 return err; 235 } 236 237 qp->req.wqe_index = producer_index(qp->sq.queue); 238 qp->req.state = QP_STATE_RESET; 239 qp->req.opcode = -1; 240 qp->comp.opcode = -1; 241 242 spin_lock_init(&qp->sq.sq_lock); 243 skb_queue_head_init(&qp->req_pkts); 244 245 rxe_init_task(rxe, &qp->req.task, qp, 246 rxe_requester, "req"); 247 rxe_init_task(rxe, &qp->comp.task, qp, 248 rxe_completer, "comp"); 249 250 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 251 if (init->qp_type == IB_QPT_RC) { 252 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0); 253 timer_setup(&qp->retrans_timer, retransmit_timer, 0); 254 } 255 return 0; 256 } 257 258 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 259 struct ib_qp_init_attr *init, 260 struct ib_udata *udata, 261 struct rxe_create_qp_resp __user *uresp) 262 { 263 int err; 264 int wqe_size; 265 266 if (!qp->srq) { 267 qp->rq.max_wr = init->cap.max_recv_wr; 268 qp->rq.max_sge = init->cap.max_recv_sge; 269 270 wqe_size = rcv_wqe_size(qp->rq.max_sge); 271 272 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n", 273 qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size); 274 275 qp->rq.queue = rxe_queue_init(rxe, 276 &qp->rq.max_wr, 277 wqe_size); 278 if (!qp->rq.queue) 279 return -ENOMEM; 280 281 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, 282 qp->rq.queue->buf, qp->rq.queue->buf_size, 283 &qp->rq.queue->ip); 284 if (err) { 285 vfree(qp->rq.queue->buf); 286 kfree(qp->rq.queue); 287 return err; 288 } 289 } 290 291 spin_lock_init(&qp->rq.producer_lock); 292 spin_lock_init(&qp->rq.consumer_lock); 293 294 skb_queue_head_init(&qp->resp_pkts); 295 296 rxe_init_task(rxe, &qp->resp.task, qp, 297 rxe_responder, "resp"); 298 299 qp->resp.opcode = OPCODE_NONE; 300 qp->resp.msn = 0; 301 qp->resp.state = QP_STATE_RESET; 302 303 return 0; 304 } 305 306 /* called by the create qp verb */ 307 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 308 struct ib_qp_init_attr *init, 309 struct rxe_create_qp_resp __user *uresp, 310 struct ib_pd *ibpd, 311 struct ib_udata *udata) 312 { 313 int err; 314 struct rxe_cq *rcq = to_rcq(init->recv_cq); 315 struct rxe_cq *scq = to_rcq(init->send_cq); 316 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 317 318 rxe_add_ref(pd); 319 rxe_add_ref(rcq); 320 rxe_add_ref(scq); 321 if (srq) 322 rxe_add_ref(srq); 323 324 qp->pd = pd; 325 qp->rcq = rcq; 326 qp->scq = scq; 327 qp->srq = srq; 328 329 rxe_qp_init_misc(rxe, qp, init); 330 331 err = rxe_qp_init_req(rxe, qp, init, udata, uresp); 332 if (err) 333 goto err1; 334 335 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); 336 if (err) 337 goto err2; 338 339 qp->attr.qp_state = IB_QPS_RESET; 340 qp->valid = 1; 341 342 return 0; 343 344 err2: 345 rxe_queue_cleanup(qp->sq.queue); 346 err1: 347 if (srq) 348 rxe_drop_ref(srq); 349 rxe_drop_ref(scq); 350 rxe_drop_ref(rcq); 351 rxe_drop_ref(pd); 352 353 return err; 354 } 355 356 /* called by the query qp verb */ 357 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 358 { 359 init->event_handler = qp->ibqp.event_handler; 360 init->qp_context = qp->ibqp.qp_context; 361 init->send_cq = qp->ibqp.send_cq; 362 init->recv_cq = qp->ibqp.recv_cq; 363 init->srq = qp->ibqp.srq; 364 365 init->cap.max_send_wr = qp->sq.max_wr; 366 init->cap.max_send_sge = qp->sq.max_sge; 367 init->cap.max_inline_data = qp->sq.max_inline; 368 369 if (!qp->srq) { 370 init->cap.max_recv_wr = qp->rq.max_wr; 371 init->cap.max_recv_sge = qp->rq.max_sge; 372 } 373 374 init->sq_sig_type = qp->sq_sig_type; 375 376 init->qp_type = qp->ibqp.qp_type; 377 init->port_num = 1; 378 379 return 0; 380 } 381 382 /* called by the modify qp verb, this routine checks all the parameters before 383 * making any changes 384 */ 385 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 386 struct ib_qp_attr *attr, int mask) 387 { 388 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ? 389 attr->cur_qp_state : qp->attr.qp_state; 390 enum ib_qp_state new_state = (mask & IB_QP_STATE) ? 391 attr->qp_state : cur_state; 392 393 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) { 394 pr_warn("invalid mask or state for qp\n"); 395 goto err1; 396 } 397 398 if (mask & IB_QP_STATE) { 399 if (cur_state == IB_QPS_SQD) { 400 if (qp->req.state == QP_STATE_DRAIN && 401 new_state != IB_QPS_ERR) 402 goto err1; 403 } 404 } 405 406 if (mask & IB_QP_PORT) { 407 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) { 408 pr_warn("invalid port %d\n", attr->port_num); 409 goto err1; 410 } 411 } 412 413 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 414 goto err1; 415 416 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr)) 417 goto err1; 418 419 if (mask & IB_QP_ALT_PATH) { 420 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr)) 421 goto err1; 422 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) { 423 pr_warn("invalid alt port %d\n", attr->alt_port_num); 424 goto err1; 425 } 426 if (attr->alt_timeout > 31) { 427 pr_warn("invalid QP alt timeout %d > 31\n", 428 attr->alt_timeout); 429 goto err1; 430 } 431 } 432 433 if (mask & IB_QP_PATH_MTU) { 434 struct rxe_port *port = &rxe->port; 435 436 enum ib_mtu max_mtu = port->attr.max_mtu; 437 enum ib_mtu mtu = attr->path_mtu; 438 439 if (mtu > max_mtu) { 440 pr_debug("invalid mtu (%d) > (%d)\n", 441 ib_mtu_enum_to_int(mtu), 442 ib_mtu_enum_to_int(max_mtu)); 443 goto err1; 444 } 445 } 446 447 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 448 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 449 pr_warn("invalid max_rd_atomic %d > %d\n", 450 attr->max_rd_atomic, 451 rxe->attr.max_qp_rd_atom); 452 goto err1; 453 } 454 } 455 456 if (mask & IB_QP_TIMEOUT) { 457 if (attr->timeout > 31) { 458 pr_warn("invalid QP timeout %d > 31\n", 459 attr->timeout); 460 goto err1; 461 } 462 } 463 464 return 0; 465 466 err1: 467 return -EINVAL; 468 } 469 470 /* move the qp to the reset state */ 471 static void rxe_qp_reset(struct rxe_qp *qp) 472 { 473 /* stop tasks from running */ 474 rxe_disable_task(&qp->resp.task); 475 476 /* stop request/comp */ 477 if (qp->sq.queue) { 478 if (qp_type(qp) == IB_QPT_RC) 479 rxe_disable_task(&qp->comp.task); 480 rxe_disable_task(&qp->req.task); 481 } 482 483 /* move qp to the reset state */ 484 qp->req.state = QP_STATE_RESET; 485 qp->resp.state = QP_STATE_RESET; 486 487 /* let state machines reset themselves drain work and packet queues 488 * etc. 489 */ 490 __rxe_do_task(&qp->resp.task); 491 492 if (qp->sq.queue) { 493 __rxe_do_task(&qp->comp.task); 494 __rxe_do_task(&qp->req.task); 495 rxe_queue_reset(qp->sq.queue); 496 } 497 498 /* cleanup attributes */ 499 atomic_set(&qp->ssn, 0); 500 qp->req.opcode = -1; 501 qp->req.need_retry = 0; 502 qp->req.noack_pkts = 0; 503 qp->resp.msn = 0; 504 qp->resp.opcode = -1; 505 qp->resp.drop_msg = 0; 506 qp->resp.goto_error = 0; 507 qp->resp.sent_psn_nak = 0; 508 509 if (qp->resp.mr) { 510 rxe_drop_ref(qp->resp.mr); 511 qp->resp.mr = NULL; 512 } 513 514 cleanup_rd_atomic_resources(qp); 515 516 /* reenable tasks */ 517 rxe_enable_task(&qp->resp.task); 518 519 if (qp->sq.queue) { 520 if (qp_type(qp) == IB_QPT_RC) 521 rxe_enable_task(&qp->comp.task); 522 523 rxe_enable_task(&qp->req.task); 524 } 525 } 526 527 /* drain the send queue */ 528 static void rxe_qp_drain(struct rxe_qp *qp) 529 { 530 if (qp->sq.queue) { 531 if (qp->req.state != QP_STATE_DRAINED) { 532 qp->req.state = QP_STATE_DRAIN; 533 if (qp_type(qp) == IB_QPT_RC) 534 rxe_run_task(&qp->comp.task, 1); 535 else 536 __rxe_do_task(&qp->comp.task); 537 rxe_run_task(&qp->req.task, 1); 538 } 539 } 540 } 541 542 /* move the qp to the error state */ 543 void rxe_qp_error(struct rxe_qp *qp) 544 { 545 qp->req.state = QP_STATE_ERROR; 546 qp->resp.state = QP_STATE_ERROR; 547 qp->attr.qp_state = IB_QPS_ERR; 548 549 /* drain work and packet queues */ 550 rxe_run_task(&qp->resp.task, 1); 551 552 if (qp_type(qp) == IB_QPT_RC) 553 rxe_run_task(&qp->comp.task, 1); 554 else 555 __rxe_do_task(&qp->comp.task); 556 rxe_run_task(&qp->req.task, 1); 557 } 558 559 /* called by the modify qp verb */ 560 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 561 struct ib_udata *udata) 562 { 563 int err; 564 565 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 566 int max_rd_atomic = attr->max_rd_atomic ? 567 roundup_pow_of_two(attr->max_rd_atomic) : 0; 568 569 qp->attr.max_rd_atomic = max_rd_atomic; 570 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 571 } 572 573 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 574 int max_dest_rd_atomic = attr->max_dest_rd_atomic ? 575 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; 576 577 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 578 579 free_rd_atomic_resources(qp); 580 581 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 582 if (err) 583 return err; 584 } 585 586 if (mask & IB_QP_CUR_STATE) 587 qp->attr.cur_qp_state = attr->qp_state; 588 589 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 590 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 591 592 if (mask & IB_QP_ACCESS_FLAGS) 593 qp->attr.qp_access_flags = attr->qp_access_flags; 594 595 if (mask & IB_QP_PKEY_INDEX) 596 qp->attr.pkey_index = attr->pkey_index; 597 598 if (mask & IB_QP_PORT) 599 qp->attr.port_num = attr->port_num; 600 601 if (mask & IB_QP_QKEY) 602 qp->attr.qkey = attr->qkey; 603 604 if (mask & IB_QP_AV) 605 rxe_init_av(&attr->ah_attr, &qp->pri_av); 606 607 if (mask & IB_QP_ALT_PATH) { 608 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av); 609 qp->attr.alt_port_num = attr->alt_port_num; 610 qp->attr.alt_pkey_index = attr->alt_pkey_index; 611 qp->attr.alt_timeout = attr->alt_timeout; 612 } 613 614 if (mask & IB_QP_PATH_MTU) { 615 qp->attr.path_mtu = attr->path_mtu; 616 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 617 } 618 619 if (mask & IB_QP_TIMEOUT) { 620 qp->attr.timeout = attr->timeout; 621 if (attr->timeout == 0) { 622 qp->qp_timeout_jiffies = 0; 623 } else { 624 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 625 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 626 627 qp->qp_timeout_jiffies = j ? j : 1; 628 } 629 } 630 631 if (mask & IB_QP_RETRY_CNT) { 632 qp->attr.retry_cnt = attr->retry_cnt; 633 qp->comp.retry_cnt = attr->retry_cnt; 634 pr_debug("qp#%d set retry count = %d\n", qp_num(qp), 635 attr->retry_cnt); 636 } 637 638 if (mask & IB_QP_RNR_RETRY) { 639 qp->attr.rnr_retry = attr->rnr_retry; 640 qp->comp.rnr_retry = attr->rnr_retry; 641 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp), 642 attr->rnr_retry); 643 } 644 645 if (mask & IB_QP_RQ_PSN) { 646 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 647 qp->resp.psn = qp->attr.rq_psn; 648 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp), 649 qp->resp.psn); 650 } 651 652 if (mask & IB_QP_MIN_RNR_TIMER) { 653 qp->attr.min_rnr_timer = attr->min_rnr_timer; 654 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp), 655 attr->min_rnr_timer); 656 } 657 658 if (mask & IB_QP_SQ_PSN) { 659 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 660 qp->req.psn = qp->attr.sq_psn; 661 qp->comp.psn = qp->attr.sq_psn; 662 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn); 663 } 664 665 if (mask & IB_QP_PATH_MIG_STATE) 666 qp->attr.path_mig_state = attr->path_mig_state; 667 668 if (mask & IB_QP_DEST_QPN) 669 qp->attr.dest_qp_num = attr->dest_qp_num; 670 671 if (mask & IB_QP_STATE) { 672 qp->attr.qp_state = attr->qp_state; 673 674 switch (attr->qp_state) { 675 case IB_QPS_RESET: 676 pr_debug("qp#%d state -> RESET\n", qp_num(qp)); 677 rxe_qp_reset(qp); 678 break; 679 680 case IB_QPS_INIT: 681 pr_debug("qp#%d state -> INIT\n", qp_num(qp)); 682 qp->req.state = QP_STATE_INIT; 683 qp->resp.state = QP_STATE_INIT; 684 break; 685 686 case IB_QPS_RTR: 687 pr_debug("qp#%d state -> RTR\n", qp_num(qp)); 688 qp->resp.state = QP_STATE_READY; 689 break; 690 691 case IB_QPS_RTS: 692 pr_debug("qp#%d state -> RTS\n", qp_num(qp)); 693 qp->req.state = QP_STATE_READY; 694 break; 695 696 case IB_QPS_SQD: 697 pr_debug("qp#%d state -> SQD\n", qp_num(qp)); 698 rxe_qp_drain(qp); 699 break; 700 701 case IB_QPS_SQE: 702 pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp)); 703 /* Not possible from modify_qp. */ 704 break; 705 706 case IB_QPS_ERR: 707 pr_debug("qp#%d state -> ERR\n", qp_num(qp)); 708 rxe_qp_error(qp); 709 break; 710 } 711 } 712 713 return 0; 714 } 715 716 /* called by the query qp verb */ 717 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 718 { 719 *attr = qp->attr; 720 721 attr->rq_psn = qp->resp.psn; 722 attr->sq_psn = qp->req.psn; 723 724 attr->cap.max_send_wr = qp->sq.max_wr; 725 attr->cap.max_send_sge = qp->sq.max_sge; 726 attr->cap.max_inline_data = qp->sq.max_inline; 727 728 if (!qp->srq) { 729 attr->cap.max_recv_wr = qp->rq.max_wr; 730 attr->cap.max_recv_sge = qp->rq.max_sge; 731 } 732 733 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr); 734 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr); 735 736 if (qp->req.state == QP_STATE_DRAIN) { 737 attr->sq_draining = 1; 738 /* applications that get this state 739 * typically spin on it. yield the 740 * processor 741 */ 742 cond_resched(); 743 } else { 744 attr->sq_draining = 0; 745 } 746 747 pr_debug("attr->sq_draining = %d\n", attr->sq_draining); 748 749 return 0; 750 } 751 752 /* called by the destroy qp verb */ 753 void rxe_qp_destroy(struct rxe_qp *qp) 754 { 755 qp->valid = 0; 756 qp->qp_timeout_jiffies = 0; 757 rxe_cleanup_task(&qp->resp.task); 758 759 if (qp_type(qp) == IB_QPT_RC) { 760 del_timer_sync(&qp->retrans_timer); 761 del_timer_sync(&qp->rnr_nak_timer); 762 } 763 764 rxe_cleanup_task(&qp->req.task); 765 rxe_cleanup_task(&qp->comp.task); 766 767 /* flush out any receive wr's or pending requests */ 768 __rxe_do_task(&qp->req.task); 769 if (qp->sq.queue) { 770 __rxe_do_task(&qp->comp.task); 771 __rxe_do_task(&qp->req.task); 772 } 773 } 774 775 /* called when the last reference to the qp is dropped */ 776 static void rxe_qp_do_cleanup(struct work_struct *work) 777 { 778 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work); 779 780 rxe_drop_all_mcast_groups(qp); 781 782 if (qp->sq.queue) 783 rxe_queue_cleanup(qp->sq.queue); 784 785 if (qp->srq) 786 rxe_drop_ref(qp->srq); 787 788 if (qp->rq.queue) 789 rxe_queue_cleanup(qp->rq.queue); 790 791 if (qp->scq) 792 rxe_drop_ref(qp->scq); 793 if (qp->rcq) 794 rxe_drop_ref(qp->rcq); 795 if (qp->pd) 796 rxe_drop_ref(qp->pd); 797 798 if (qp->resp.mr) { 799 rxe_drop_ref(qp->resp.mr); 800 qp->resp.mr = NULL; 801 } 802 803 if (qp_type(qp) == IB_QPT_RC) 804 sk_dst_reset(qp->sk->sk); 805 806 free_rd_atomic_resources(qp); 807 808 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 809 sock_release(qp->sk); 810 } 811 812 /* called when the last reference to the qp is dropped */ 813 void rxe_qp_cleanup(struct rxe_pool_entry *arg) 814 { 815 struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem); 816 817 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work); 818 } 819